P. Sharma and P. Sinha, “Green One-Pot Pseudo-Four Component Synthesis of Substituted 5-Cyano-2-imino-4-aryl/ heteroaryl-6-(phenylthio)-2H-pyran-3-carboxylic Acid Catalyzed by Montmorillonite K-10 Clay”, ajc, vol. 35, no. 11, pp. 2754–2758, Oct. 2023.